{
  "manageEntity": {
    "action": "Save",
    "entityId": "2147384401",
    "entityType": "Track",
    "nonce": "0x913a307335399e1bc8a77f6cc6ea39a71dc1b2377646affcc32b3fa6c0f37337",
    "signature": "0xa52ab1e9762cab1f02e8fd16e9a83df34e9ff821f5a91c25789a1592511a95c065330760d5b9eb1930843d44a7734f6dc2c0f3718bfb2d1fd19f1a6c612d2cc21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}